Borderline Personality Disorder (BPD) is an often misunderstood, serious emotional disturbance characterized by pervasive instability in moods, difficult interpersonal relationships, negative self image and dysfunctional behaviors.  It is a disorder of emotional regulation. This condition often disrupts family and work relationships, inhibits long-term planning and negative affects the individual’s sense of self-identity. While less well known than bipolar disorder (manic-depressive disorder), BPD is just as common, affecting 1 to 2 percent of the general population.